The extract was meaning that even if one had a 100% perfect ATP (itself a theoretical concept) then there will be some accidents since other things could go wrong. A train could derail owing to a rail defect or axle fracture.
The ATP cannot warn the driver if the rails have become wide to gauge, or all the stretcher bars on the points have become ineffective, the sea wall has become washed away leaving the rails suspended in mid air etc.
Accidents can still happen even if there is no driver error and no signalling malfunction; not everything is preventable by ATP. Therefore when assessing the safety benefit of providing ATP so that a proper consideration can be made re whether it justifies its cost, then have to recognise that some of the accidents would still occur.
The ATP cannot warn the driver if the rails have become wide to gauge, or all the stretcher bars on the points have become ineffective, the sea wall has become washed away leaving the rails suspended in mid air etc.
Accidents can still happen even if there is no driver error and no signalling malfunction; not everything is preventable by ATP. Therefore when assessing the safety benefit of providing ATP so that a proper consideration can be made re whether it justifies its cost, then have to recognise that some of the accidents would still occur.
(12-09-2014, 04:49 PM)asrisaku Wrote: Thanks Peter and PJW for kindness explanation.
Quote:Is it true that ATP cannot have ability to detect train derailment?
Not sure what you are asking here.
I was confused with the words from the attachment. It could be a different topic, I guess.
PJW